Coffee-urn.



No. 851,417. l vPATzN'llEID APR; 2.3, 1907.

J; HBINRIGHS.

COFFEE URN.

APPLICATION FILED JAN. 151904.

IIIIIIII enables said dome to JOSEPH HEINRIOHS, OF NEW YORK, N. Y.

COFFEE-URN.

Speeication of Letters Patent.

Eatented April 23, 1907.

Application filed Januaryll5, 1904. Serial No. 189.137.

To a/ZZ whom 'if 'n1/f1 7/ (formera:

Be it known that I, JOSEPH HnINnrcI-rs, a citizen of the United States, residing in the city of New York, borough ol' Manhattan, in the county of New York and State of New York, have invented new and useful lmprovements in Coffee-Urns, of which the `following is a specilication.

My invention relates to coffee pots or urns 0f that kind which are used more especially in preparing a small quantity of beverage for immediate consumption, say one, two or more cups of after dinner co'fl'ee.

In individual eoilee pots it is essential that three important factors be combined in a single unitary structure. The first condition is to overcome any tendency of the beverage to boil in order to preserve the AI'lavor or' the extract; the second is the ability to prepare a very small quantity of beverage, say one cupiul, in a table pot or urn having a capacity up to prepare six cups of beverage, and the third is to enable the interior of the apparatus to be thoroughly cleansed by scouring the same. rlhe table urn or' this invention is especially constructed to secure these three advantages, and thereby produce a practical, successful and self-contained beverage-making apparatus which is economical in operation and cheap of manufacture.

My portable or table urn comprises a reservoir, a material chamber resting on said reservoir, a heating chamber oi less area than the reservoir, below the same, and provided with a boundary wall which rises perpendicularly from the bottom of said heating chamber, a dome having a steam tight lirictional engagement with said chamber, a lleed pipe through said dome and leading from the heating -chamber to the material chamber, and a return tube located within the edge of the dome and leading 'from the reservoir to the heating chamber. The steam-tight engagement between the dome and the wall or' the heating-chamber is secured by a taper on the circumscribing wall et the dome which be wedged tightly into the chamber. This construction secures a two-fold function; lirst, the wall of the heating chamber is vertical, so as to expose the whole area of the bottom ol said chamber, in order that the same may be exposed to view, and all the surfaces of the chamber are accessible easily ior cleaning purposes by a scourl i. l

l ber is secured, thus enabling a small quantity i' water tobe heated in the reduced bottom chamber, from which the water is lifted, by steam pressure, through the vleed pipe and thence to the material chamber.

The bottom heating chamber oi my urn is quite shallow and it is oi" the same diameter as the internal diameter of the circumscribingI vertical wall, thus exposing the whole area of the bottom oi' the chamber and the entire inner surface of the wall.

The return tube from the reservoir to the heating chamber extends through the removable steam dome, and is located within the tapering edge or' said dome, thus placing the tube out of the way and making it removable with the dome. rlhis tube is of less diameter than the 'lecd pipe in order to return the beverage to the bottom chamber at a rate which prevents the decoction or beverage from boiling, and the lower end of this tube extends quite close to the bottom oi" the heating chamber, so that it will return the beverage thereto and at the same time prevent the escape of steam 'lrom the bottom chamber into the reservoir.

Reference is to be had to the accompanjing drawings, -forming a part of this specilication, wherein like characters of reference are used to indicate corresponding parts in both the 'figures Figure l is a sectional elevation, portable coil'ee pot or urn embodying my improvements. Fig. 2 is a detail Iperspective view of the steam dome removed from the parts oi the apparatus.

A designates a suitable stand which is shown as having a seat `for a heater G, herein shown as an alcohol lamp. On the upper part oi" this stand, directly over the heater is a liquid heating chamber D, which is shown as made in one piece with a reservoir O. The chamber D is quite shallow, and it is oi less diameter than thechainber or the reservoir; in `fact, the subjaccnt chamber D is o'l very small capacity as compared with the reservoir O or the material chamber B. The shallow chamber D consists el a vllat bottom d and an annular circumscribing wall (Z, the latter rising perpendicul arly 'from the bottom fl and producing a chamber the mean width ol which is equal to the internal diameter of said vertical wall J.

The reservoir O is directly through a above the heating operation; and secondly, a steam tight ing chamber D, and on this reservoir is :fitted connection between the dome and the chaml l l l the container which lorms the chamber B,

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adapted to be charged with a suitable quantity of material from which the beverage is to be prepared. The removable container B has a foraminous bottom b, through which the beverage may trickle in order to accumulate in the reservoir C.

F designates a removable steam dome havh ing wedging engagement with the annular wall d of the heating chamber D, so as to secure a steam tight connection between the dome and the heating chamber. This dome is of hollow or chambered construction, and as shown by Fig. l, it consists of a top member, a bottom member f', and a circumferential wall which joins the top and bottom members, and which is made slightly conical or tapering as represented by Fig. 2, in order I that the desired wedging engagement be? tween the dome and the heating' chamber may be secured. The bottom member j" is provided with a central dished portion f2, (see Fig. l), and from this dished member extends the feed pipe H, said pipe passing through the dome, the reservoir C and the foraminous bottom so as to discharge the liquid into the chamber B, through suitable openings 7L.

The steam dome F is fitted within the shallow chamber D, so that its bottom pcrtionf is quite close to the bottom d of said heating chamber, thereby reducing the vertical dimensions of the heating chamber when the parts are assembled for use and permitting a small quantity of liquid or beverage to be contained in said heating chamber. The dished portion f 2 of the bottom provides the required space for the accumulation of steam in the chamber D, which steam is necessary to exert pressure on the liquid or beverage required to force said beverage through the feed pipe H, thereby discharging the liquid or beverage upon the material contained in the chamber B.

Communication between the reservoir C and the heatingchamber D is established by a return tube f 3. This tube extends through the chambered dome, and it lies within the edge of the latter. As shown by the drawings, the tube f3 is integral with the steam dome, and it is removable with said dome and insertible therewith, said return tube being out of the way and obviating any special construction of the apparatus for its accommodation. The return tube f3 is of less diameter than the feed pipe H, and this tube extends below the bottom f of the dome, so as to extend into the liquid present in the chamber D, whereby the tube serves to return the liquid from the reservoir C to the chamber D at a rate which will prevent the liquid from boiling in the chamber, and at the same time the lower end of the tube will be sealed bythe liquid in a way to overcome the escape of steam from said chamber D directly into the reservoir C.

The beverage may be drawn from the chamber D and through a delivery pipe d2, the latter being provided with the usual stop cock d3.

In the operation of my urn the material is placed in the chamber B, and a proper quantity of water is introduced in the apparatus. The lamp G having been lighted, the water in the chamber D is heated and the pressure generated therein causes the water to rise through the pipe H, from whence it is discharged upon the material in the chamber B. The water percolates through the material and passes into the reservoir C, from whence it is returned by the tube f3 to the chamber D. The circulation is continued until the beverage attains the desired strength, and it is drawn off through the valved pipe d3.

l/Vhat I claim as new and desire to secure by Letters Patent is l. In a device of the class described, a reservoir, a shallow chamber at the bottom of said reservoir, said chamber having anA annular circumscribing wall, a material chamber above the reservoir, a hollow non-perforated steam dome F fitted into steam tight engagement with said annular wall of the shallow-chamber and said dome extending downwardly into said shallow chamber so as to reduce the vertical dimensions of the chamber between the bottom thereof and the bottom of the dome, the bottom of said dome having a dished steam cavity extending toward the top of said dome, a feed pipe extending from the dished cavity of the steam dome upwardly into the material chamber, and a return tube from the reservoir to the shallow chamber. f

2. In a device of the class described, a reservoir, a shallow chamber having an annular wall, a material chamber above the reservoir, a non-perforated steam dome having steamtight engagement with said annular wall and extending downwardly into the shallow chamber for reducing the vertical dimensions of the free space between the bottom of the dome and the bottom of the chamber, said steam dome comprising top and bottom plates connected by an intermediate conical wall, and said bottom plate provided with a steam cavity f2, a feed tube extending upwardly from the steam cavity of said dome, and a return tube extending from the reservoir to the shallow chamber.

(Signed) JOSEPH HEINRICHS.

Vitnesses;

R. B. CAVANAGH, H. I. BERNHARD.

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